Physics Past Questions v25 for (JAMB/WAEC/NECO)

Physics Past Questions v25 For (JAMB/WAEC/NECO); These Physics past questions are for students who are sitting for the following examinations

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#1. Two magnets are used to magnetize a soft iron bar PQ as illustrated in the diagram given. The correct polarity at P and Q respectively

A) S and N

A) S and N

B) N and N

B) N and N

D) N and S

D) N and S

C) S and S

C) S and S

#2. A boy ran a distance of 200m in 24s. His average speed was 8.3ms-1. Which of the following is correct about the units in which the statements above are expressed?

A) All the units are fundamental.

A) All the units are fundamental.

B) All the units are derived

B) All the units are derived

C) All the units except one are S.I units

C) All the units except one are S.I units

D) Two of the units are fundamental and one derived.

D) Two of the units are fundamental and one derived.

E) None of the units is S.I units.

E) None of the units is S.I units.

#3. A boy moving with a velocity of 3 ms-1 is brought to rest by a constant force after travelling 15m. Calculate the retardation.

A) 0.15ms-2

A) 0.15ms-2

B) 0.30ms-2

B) 0.30ms-2

C) 0.60ms-2

C) 0.60ms-2

D) 3.33ms-2

D) 3.33ms-2

E) 6.66ms-2

E) 6.66ms-2

#4. A block of a substance X will sink in a liquid V but float liquid Z. Which of the following statements is NOT correct about the densities of the three substances?

A) Density of liquid Z is greater than that of X

A) Density of liquid Z is greater than that of X

B) Density of liquid V is less than that of liquid X

B) Density of liquid V is less than that of liquid X

C) Density of liquid Y is less than that of liquid Z

C) Density of liquid Y is less than that of liquid Z

D) Liquid Z has the greatest density of all the three substances.

D) Liquid Z has the greatest density of all the three substances.

E) If liquids Y and Z do not mix, liquid Z will float on liquid Y.

E) If liquids Y and Z do not mix, liquid Z will float on liquid Y.

#5. I. A scalar quantity has only magnitude II. A scalar quantity has both magnitude and direction III. A vector quantity has both magnitude and direction IV. A vector quantity has only magnitude.Which of the above statement is/are correct?

A) I only

A) I only

B) l and II only

B) l and II only

C) l and III only

C) l and III only

D) II and III only

D) II and III only

E) II and III only

E) II and III only

#6. An electric bell operated within an evacuated bell jar enables us to infer correctly that

A) light waves require a medium for transmission

A) light waves require a medium for transmission

B) sound waves do not require a medium for transmission

B) sound waves do not require a medium for transmission

C) light waves do not require a medium for transmission but sound waves do

C) light waves do not require a medium for transmission but sound waves do

D) light waves travel much faster than sound waves

D) light waves travel much faster than sound waves

E) light waves and sound waves travel at the same speed

E) light waves and sound waves travel at the same speed

#7. The image obtained on the screen of a pin-hole camera becomes less sharply defined when the

A) object is moved farther from the pin-hole

A) object is moved farther from the pin-hole

B) screen is moved farther from the pin-hole

B) screen is moved farther from the pin-hole

C) object is made smaller

C) object is made smaller

D) illumination is made more intense

D) illumination is made more intense

E) pin-hole is made larger.

E) pin-hole is made larger.

#8. Which of the following statements about evaporation and boiling is FALSE?

A) Evaporation may take place at any temperature.

A) Evaporation may take place at any temperature.

B) In evaporation, vapour escapes only from the surface of a liquid

B) In evaporation, vapour escapes only from the surface of a liquid

C) The temperature remains constant as long as the liquid is boiling

C) The temperature remains constant as long as the liquid is boiling

D) The temperature at which boiling takes place can be altered by changing the external pressure

D) The temperature at which boiling takes place can be altered by changing the external pressure

E) The rate of evaporation does not depend on temperature.

E) The rate of evaporation does not depend on temperature.

#9. The smallest unit on the sleeve of a micrometer screw gauge is 0.5mm. There are fifty divisions on the thimble of the screw gauge. What is the smallest length that can be measured with this instrument?

A) 0.05cm

A) 0.05cm

B) 0.01cm

B) 0.01cm

C) 0.005cm

C) 0.005cm

D) 0.001cm

D) 0.001cm

E) 0.0001cm

E) 0.0001cm

#10. Two 2.0Ω resistors can be combined circuit to give an overall resistance of

A) 0.5Ω only

A) 0.5Ω only

B) 1.0 Ω only

B) 1.0 Ω only

C) either 0,5Ω or 1.0 Ω

C) either 0,5Ω or 1.0 Ω

D) either 1.0Ω or 4.0 Ω

D) either 1.0Ω or 4.0 Ω

E) either 0.5Ω, 1.0Ω or 4.0Ω

E) either 0.5Ω, 1.0Ω or 4.0Ω

#11. An astronomical telescope which is being used to view a very distant object is said to be in normal adjustment if

A) the final image is at the near-point

A) the final image is at the near-point

B) the image formed by the objective is before the focus of the eye piece

B) the image formed by the objective is before the focus of the eye piece

C) the angular magnification is the ratio of the focal length of the eye-piece lens to that of the objective

C) the angular magnification is the ratio of the focal length of the eye-piece lens to that of the objective

D) the foci dl the objective and the eye-piece coincide between the lenses

D) the foci dl the objective and the eye-piece coincide between the lenses

E) the distance between the objective lens and the eye-piece is equal to the difference between their focal lengths.

E) the distance between the objective lens and the eye-piece is equal to the difference between their focal lengths.

#12. The image is a plane mirror is

A) inverted, real with a magnificant of

A) inverted, real with a magnificant of

B) inverted, virtual with a magnification of 1

B) inverted, virtual with a magnification of 1

C) inverted, real with a magnification of 2

C) inverted, real with a magnification of 2

D) upright, virtual with a magnificent of 1

D) upright, virtual with a magnificent of 1

E) upright, real with a magnification of 2

E) upright, real with a magnification of 2

#13. An electric iron rated 250 V has a coil of resistance 125Ω. What is the cost of using it for I hour at 10k per kWh?

A) 1.25k

A) 1.25k

B) 2.50k

B) 2.50k

C) 5.00k

C) 5.00k

D) 10.00k

D) 10.00k

E) 20.00k

E) 20.00k

#14. If the first position of resonance in a resonance tube is 18.0cm from the open end, the distance from the open end to the next position of resonance will be

A) 24.0cm

A) 24.0cm

B) 27.0cm

B) 27.0cm

C) 36.0cm

C) 36.0cm

D) 45.0cm

D) 45.0cm

E) 54.0cm

E) 54.0cm

#15. Calculate the peak voltage of a mains supply of r.ms. value 220V.

A) 121 V

A) 121 V

B) 156 V

B) 156 V

C) 225 V

C) 225 V

D) 240 V

D) 240 V

E) 311 V

E) 311 V

#16. The clinical thermometer differs from other mercury-in-glass thermometers because it has I. a constriction II. a wide range III. a short range IV. a narrow bore. Which of the above are correct?

A) I and II only

A) I and II only

B) I and III only

B) I and III only

C) III and IV only

C) III and IV only

D) I,II and III only

D) I,II and III only

E) I, III and IV only

E) I, III and IV only

#17. If a positively charged glass-rod is used to charge an electroscope X by contact and an electroscope Y by induction, then

A) X and Y will be negatively charge

A) X and Y will be negatively charge

B) X and Y will be positively charged

B) X and Y will be positively charged

C) X will be negatively charged and Y positively charged

C) X will be negatively charged and Y positively charged

D) X will be positively charged and Y negatively charged

D) X will be positively charged and Y negatively charged

E) X will be positively charged and Y will remain uncharged

E) X will be positively charged and Y will remain uncharged

#18. A wave travels a distance of 20 cm in 3s. The distance between successive crests of the wave is 4cm. What is the frequency of the wave?

A) 0.60Hz

A) 0.60Hz

B) 1.67Hz

B) 1.67Hz

C) 7.50Hz

C) 7.50Hz

D) 15.00Hz

D) 15.00Hz

E) 26.67Hz

E) 26.67Hz

#19. The unit of inductance is

A) Weber

A) Weber

B) Telsa

B) Telsa

C) Hertz

C) Hertz

D) Henry

D) Henry

E) Farad

E) Farad

#20. A man at the back of a crowd watches a parade by holding a plane mirror just above his head. The parade passes 6 metres behinde his head and the mirror is 0.25m in front of the man. How far does the image in the mirror appear to be from the man?

A) 6.50m

A) 6.50m

B) 6.25m

B) 6.25m

C) 6.00m

C) 6.00m

D) 5.75m

D) 5.75m

E) 5.50m

E) 5.50m

#21. A solid weights 5.0 N in air, 4.2 N in water and 4.4 N in liquid Y. Calculate the relative density of liquid Y.

A) 0.75

A) 0.75

B) 0.88

B) 0.88

C) 0.95

C) 0.95

D) 1.13

D) 1.13

E) 1.33

E) 1.33

#22. Two forces forming a couple are separated by a distance of 25cm. If one of the forces equals 40N, what is the moment of the couple?

A) 1000 Nm

A) 1000 Nm

B) 500 Nm

B) 500 Nm

C) 10 Nm

C) 10 Nm

D) 5 Nm

D) 5 Nm

E) 1.6 Nm

E) 1.6 Nm

#23. Which of the following is NOT part of an a.c generator?

A) Commutator

A) Commutator

B) Armature

B) Armature

C) Field magnet

C) Field magnet

D) Carbon brushes

D) Carbon brushes

E) Slip rings

E) Slip rings

#24. In a simple pendulum experiment, a boy observed that the times for 30 oscillations are 70.0s, 72.0s and 67.0s respectively. Calculate the mean period of oscillation of the pendulum.

A) 0.14s

A) 0.14s

B) 0.43s

B) 0.43s

C) 2.32s

C) 2.32s

D) 2.40s

D) 2.40s

E) 6.97s

E) 6.97s

#25. The specific heat of a substance in the solid state is C1; its specific beat in the liquid state is C2 and its latent heat of fusion is L. If a mass M of the substance is changed from the solid state at temperature T, to the liquid state, also at temperature T, the amount of heat required will be

A) M(C1 ÷ C2) x T

A) M(C1 ÷ C2) x T

B) ML

B) ML

C) L

C) L

E) ML(C1 + C2 ÷ 2) × T

E) ML(C1 + C2 ÷ 2) × T

#26. An element of nuclear number A and proton number Z emits an alpha particle from its nucleus. The nucleon number and the proton number of the new element formed are respectively

A) (A – 2) and (Z – 2)

A) (A – 2) and (Z – 2)

B) (A + 4) and (Z + 2)

B) (A + 4) and (Z + 2)

C) (A– 4) and (Z+2)

C) (A– 4) and (Z+2)

D) (A+ 4) and (Z – 2)

D) (A+ 4) and (Z – 2)

E) (A – 4) and (Z– 2)

E) (A – 4) and (Z– 2)

#27. 400g of cold water is added to 200g of water at 70°C. If they are properly mixed and the temperature of the mixture is 300°C. calculate the initial temperature of the cold water. (Neglect the heat absorbed by the container)

A) 10°C

A) 10°C

B) 15°C

B) 15°C

C) 20°C

C) 20°C

D) 30°C

D) 30°C

E) 40°C

E) 40°C

#28. The heat from a fire in a closed room reaches someone far away in the room, mainly by

A) reflection

A) reflection

B) diffusion

B) diffusion

C) conduction

C) conduction

D) radiation

D) radiation

E) convection

E) convection

#29. Which of the following is used in a nuclear reactor to slow down fast moving neutrons?

A) graphite rods

A) graphite rods

B) carbon dioxide gas

B) carbon dioxide gas

C) liquid sodium metal

C) liquid sodium metal

D) concrete shield

D) concrete shield

E) boron rods

E) boron rods

#30. When electrical power is transmitted over long distances, the voltage is stepped up so that

A) the resistance of the wire may be increased proportionately to the potential difference

A) the resistance of the wire may be increased proportionately to the potential difference

B) the time of transmissions between the generating and the receiving stations may be reduced

B) the time of transmissions between the generating and the receiving stations may be reduced

C) there is increased current to produce brighter lights.

C) there is increased current to produce brighter lights.

D) the rate of electrical consumption is increased.

D) the rate of electrical consumption is increased.

E) the energy waste may be minimised as the current is lowered.

E) the energy waste may be minimised as the current is lowered.

#31. A gas occupies a certain volume at 27°C. At what temperature will its pressure remains constant?

A) 54°C

A) 54°C

B) 108°C

B) 108°C

C) 150°C

C) 150°C

D) 327°C

D) 327°C

E) 600°C

E) 600°C

#32. When a lever is in equilibrium, under the action of two or more forces, the algebraic sum of the moments of the forces about the point of support is

A) anti-clockwise

A) anti-clockwise

B) clockwise

B) clockwise

C) equal to the product to the forces

C) equal to the product to the forces

D) numerically equal to the total forces acting

D) numerically equal to the total forces acting

E) equal to zero

E) equal to zero

#33. When a metal is heated to a high temperature, electrons are emitted from its surface. The process is known as

A) photoelectric effect

A) photoelectric effect

B) thermionic emission

B) thermionic emission

C) field emission

C) field emission

D) secondary emission

D) secondary emission

E) radioactive

E) radioactive

#34. A piece of stone weights 180 N in air and 150 N in a beaker containing 160 N of methylated spirit. What is the up thrust exerted on the stone?

A) 50N

A) 50N

B) 40N

B) 40N

C) 30N

C) 30N

D) 20N

D) 20N

E) 10N

E) 10N

#35. A handbag containing some load weighing 162N is carried by two students each holding the handle of the bag next to him. If each handle is pulled 60 degree to the vertical, find the force on each student's arm

A) 81N

A) 81N

B) 121N

B) 121N

C) 162N

C) 162N

D) 324N

D) 324N

#36. In the diagram above, the values of V1 and V2 are respectively

A) 1V and 1/3V

A) 1V and 1/3V

B) 1/3V and 1V

B) 1/3V and 1V

C) 1/3V and 2/3V

C) 1/3V and 2/3V

D) 1V and 2/3V

D) 1V and 2/3V

#37. The correct position for a fuse in the diagram above is

A) between P and Q

A) between P and Q

B) Q

B) Q

C) S

C) S

D) P

D) P

#38. If current flows in the direction of the arrows in the solenoid above, the north pole is at

A) P

A) P

B) Y

B) Y

C) X

C) X

D) Q

D) Q

#39. In the a.c circuit above, the current value is

A) 0.58 A

A) 0.58 A

B) 3.00 A

B) 3.00 A

C) 4.00 A

C) 4.00 A

D) 6.67 A

D) 6.67 A

#40. A transverse wave is applied to a string whose mass per unit length is 3 x 10-2kgm-1. If the string is under a tension 12N, the speed of the propagation of the wave is

A) 5 ms-1

A) 5 ms-1

B) 20 ms-1

B) 20 ms-1

C) 30 ms-1

C) 30 ms-1

D) 40 ms-1

D) 40 ms-1

#41. An engineer intends to deviate a light ray from its path by 120o through reflection from a plane mirror. Calculate the angle of incidence

A) 60o

A) 60o

B) 40o

B) 40o

C) 30o

C) 30o

D) 20o

D) 20o

#42. The diagram above shows a maximum and minimum thermometer divided into three portions P, Q and R. Which of the following is true about the respective content of P,Q and R

A) Alcohol, mercury and alcohol

A) Alcohol, mercury and alcohol

B) Air, alcohol and mercury

B) Air, alcohol and mercury

C) Mercury, alcohol and mercury

C) Mercury, alcohol and mercury

D) Air, mercury and alcohol

D) Air, mercury and alcohol

#43. The diagram above shows two capacitors P and Q of capacitance 5μF and 10μF. Find the charges stored in P and Q respectively

A) 2μC and 4μC

A) 2μC and 4μC

B) 4μC and 2μC

B) 4μC and 2μC

C) 100μC and 200μC

C) 100μC and 200μC

D) 200μC and 100μC

D) 200μC and 100μC

#44. In the diagram above a beam of white light travels from a rare to a dense medium. What colours of light do the rays a, b and c respectively represents?

A) red, green and blue

A) red, green and blue

B) Green, red and blue

B) Green, red and blue

C) Yellow , blue and red

C) Yellow , blue and red

D) Blue , yellow and red

D) Blue , yellow and red

#45. The velocity y of a particle in a time t is given by the equation Y = 10 + 2t2 Find the instantaneous acceleration after 5 seconds

A) 60 ms-2

A) 60 ms-2

B) 20 ms-2

B) 20 ms-2

C) 15 ms-2

C) 15 ms-2

D) 10 ms-2

D) 10 ms-2

#46. A simple pendulum has a period of 17.0s. When the length is shorten by 1.5m, its period is 8.5s. Calculate the original length of the pendulum

A) 4.0 m

A) 4.0 m

B) 3.0 m

B) 3.0 m

C) 2.0 m

C) 2.0 m

D) 1.5 m

D) 1.5 m

#47. A sonometer wire is vibrating at frequency fo. If the tension in the wire is doubted while the length and the mass per unit length are kept constant, the new frequency of vibration is

A) fo/2

A) fo/2

B) 2fo

B) 2fo

C) fo/√2

C) fo/√2

D) fo√2

D) fo√2

#48. A travelling wave moving from left to right has an amplitude of 0.15m, a frequency of 550Hz and a wavelength of 0.01m. The equation describing the wave is

A) y = 0.15 sin 200π(x - 5.5t)

A) y = 0.15 sin 200π(x - 5.5t)

B) y = 0.15 sin π(0.01x - 5.5t)

B) y = 0.15 sin π(0.01x - 5.5t)

C) y = 0.15 sin 5.5π(x - 200t)

C) y = 0.15 sin 5.5π(x - 200t)

D) y = 0.15 sin π(550x - 0.01t)

D) y = 0.15 sin π(550x - 0.01t)

#49. A cell of internal resistance 1Ω supplies current to an external resistor of 3Ω. The efficiency of the cell is

A) 25%

A) 25%

B) 33%

B) 33%

C) 50%

C) 50%

D) 75%

D) 75%

#50. A conductor of length 2m carries a current of 0.8A while kept in a magnetic field of magnetic flux density 0.5T. The maximum force acting on it is

A) 0.2N

A) 0.2N

B) 0.8N

B) 0.8N

C) 3.2N

C) 3.2N

D) 8.0N

D) 8.0N

#51. An electric generator with a power output of 3.0KW at a voltage of 1.5KV distributes power along cables of resistance 20.0Ω. The power loss in the cables is

A) 80.0W

A) 80.0W

B) 40.0W

B) 40.0W

C) 10.0W

C) 10.0W

D) 0.1W

D) 0.1W

#52. If the frequency of an emitted x-ray is 1.6 x 1016Hz, the accelerating potential is? [e = 1.6 x 10-19C, h = 6.63 x 10-34Js]

A) 6630.0V

A) 6630.0V

B) 663.0V

B) 663.0V

C) 66.3V

C) 66.3V

D) 6.6V

D) 6.6V

#53. If the fraction of the atoms of a radioactive material left after 120years is 1/64, what is the half-life of the material?

A) 24 years

A) 24 years

B) 20 years

B) 20 years

C) 10 years

C) 10 years

D) 2 years

D) 2 years

#54. A certain radioactive source emits radiations that were found to be deflected by both magnetic and electric fields. The radiations are

A) beta rays

A) beta rays

B) gamma rays

B) gamma rays

C) x-rays

C) x-rays

D) unltr-violet rays

D) unltr-violet rays

#55. A 2H inductor has negligible resistance and is connected to a 50/π Hz A.C. Supply. The reactance of the inductor is

A) 200 Ω

A) 200 Ω

B) 50 Ω

B) 50 Ω

C) 100/π Ω

C) 100/π Ω

D) 25/π Ω

D) 25/π Ω

#56. What optical instrument can best be constructed with converging lenses of focal lengths 50cm and 5cm?

A) Compound microscope

A) Compound microscope

B) Galileo's telescope

B) Galileo's telescope

C) Terrestrial telescope

C) Terrestrial telescope

D) Astronomical telescope

D) Astronomical telescope

#57. in a pure semiconductor, the number of electrons in the conduction band is

A) less than the number of holes in the valence band

A) less than the number of holes in the valence band

B) equal to the number of holes in the valence band

B) equal to the number of holes in the valence band

C) greater than the number of holes in the valence band

C) greater than the number of holes in the valence band

D) twice the number of holes in the valence band

D) twice the number of holes in the valence band

#58. In a thermonuclear reaction, the total initial mass is 5.02 x 10-27kg and the total final mass is 0.01 x 10-27kg. The energy released in the process is [c = 3.0 x 108ms-1]

A) 9.0 x 10-13J

A) 9.0 x 10-13J

B) 9.0 x 10-12J

B) 9.0 x 10-12J

C) 9.0 x 10-11J

C) 9.0 x 10-11J

D) 9.0 x 10-10J

D) 9.0 x 10-10J

#59. A gas would serve as an electrical conductor under

A) reduced pressure and high current

A) reduced pressure and high current

B) increased magnetic field

B) increased magnetic field

C) reduced pressure and reduced potential

C) reduced pressure and reduced potential

D) exposure to visible light

D) exposure to visible light

#60. A radio is operated by eight cells each of e.m.f. 2.0V connected in series. If two of the cells are wrongly connected, the net e.m.f. of the radio is

A) 8V

A) 8V

B) 10V

B) 10V

C) 12V

C) 12V

D) 16V

D) 16V

#61. If a charged ion goes through combined electric and magnetic fields, the resultant emergent velocity of the ion is

A) E/B

A) E/B

B) EB

B) EB

C) B/E

C) B/E

D) E - B

D) E - B

#62. A projection lantern is used to give the image of a slide on a screen. If the image is 24 times as large as the slide and the screen is 72.0m from the projecting lens, what is the position of the slide from the lens?

A) 0.3m

A) 0.3m

B) 3.0m

B) 3.0m

C) 3.5m

C) 3.5m

D) 4.0m

D) 4.0m

#63. An electron of charge 1.6 x 10-19C and mass 9.1 x 10-31kg is accelerated between two metal plates with a velocity of 4 x 107ms-1, the potential difference between the plates is

A) 4.55 x 103V

A) 4.55 x 103V

B) 4.55 x 102V

B) 4.55 x 102V

C) 9.10 x 101V

C) 9.10 x 101V

D) 4.55 x 101V

D) 4.55 x 101V

#64. A cell of internal resistance 0.01Ω can be measured accurately using the

A) Ohm meter

A) Ohm meter

B) metre bridge

B) metre bridge

C) potentiometer

C) potentiometer

D) electroscope

D) electroscope

#65. A thin wire with heavy weights attached to both ends is hung over a block of ice resting on two supports. If the wire cuts through the ice block while the block remains solid behind the wire, the process is called

A) condensation

A) condensation

B) sublimation

B) sublimation

C) regelation

C) regelation

D) fusion

D) fusion

#66. Dry Day 1 - 30°C | Day 2 - 29°C | Day 3 - 25°CWet Day 1 - 22°C | Day 2 - 22°C | Day 3 - 21°CThe reading above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days

A) decreased steadily

A) decreased steadily

B) remained unchanged

B) remained unchanged

C) increased steadily

C) increased steadily

D) was least on Day 1

D) was least on Day 1

#67. One end of a long wire is fixed while a vibrator is attached to the other end. When the vibrator is energized, the types of waves generated in the wire are

A) stationary and longitudinal

A) stationary and longitudinal

B) stationary and transverse

B) stationary and transverse

C) progressive and transverse

C) progressive and transverse

D) progressive and longitudinal

D) progressive and longitudinal

#68. Share Tweet Email Google+ Question 71 A metal of mass 0.5kg is heated to 100°C and then transferred to a well-lagged calorimeter of heat capacity 80JK-1 containing water of heat capacity 420JK-1 at 15°C. If the final steady temperature of the mixture is 25°C, find the specific heat capacity of the metal.

A) 877Jkg-1K-1

A) 877Jkg-1K-1

B) 286Jkg-1K-1

B) 286Jkg-1K-1

C) 133Jkg-1K-1

C) 133Jkg-1K-1

D) 92Jkg-1K-1

D) 92Jkg-1K-1

#69. The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by

A) convection

A) convection

B) conduction

B) conduction

C) radiation

C) radiation

D) evaporation

D) evaporation

#70. I. The frictional force is independent of the area of the surfaces in conduct II. The frictional force depends on the nature of the surfaces in contact III. The frictional force depends on the speed of sliding IV. The frictional force is directly proportional to the normal reaction.Which combination of the above is true of sliding friction?

A) I, III and IV

A) I, III and IV

B) I, II and IV

B) I, II and IV

C) I, II and III

C) I, II and III

D) II, III and IV

D) II, III and IV

#71. Total internal reflection occurs when light moves from

A) a dense medium to a less dense medium

A) a dense medium to a less dense medium

B) air to water

B) air to water

C) water to glass

C) water to glass

D) a less dense to a dense medium

D) a less dense to a dense medium

#72. A quantity of water at 0°C is heated to about 30°C. At each degree rise in temperature, its density will

A) rise steadily

A) rise steadily

B) fall steadily

B) fall steadily

C) fall then rise

C) fall then rise

D) rise then fall

D) rise then fall

#73. I. Coherence II. Same frequency III. Same wavelength IV. Same IntensityWhich of the conditions above are necessary to produce interference fringes?

A) I and III

A) I and III

B) I, II and IV

B) I, II and IV

C) I, II and III

C) I, II and III

D) II and III

D) II and III

#74. A boy observes a piece of stone at the bottom of a river 6.0m deep. If he looks from the surface of the river, what is the apparent distance of the stone from him? [Refractive Index of Water = 4/3]

A) 8.0m

A) 8.0m

B) 5.5m

B) 5.5m

C) 5.0m

C) 5.0m

D) 4.5m

D) 4.5m

#75. At a fixed point below a liquid surface, the pressure downwards is P1 and pressure upwards is P2. It can be deduced that

A) P1 > P2

A) P1 > P2

B) P1 ≥ P2

B) P1 ≥ P2

C) P1< P2

C) P1< P2

D) P1 = P2

D) P1 = P2

#76. If the force and the velocity on a system are each reduced simultaneously by half, the power of the system is

A) doubled

A) doubled

B) reduced to a quarter

B) reduced to a quarter

C) reduced by half

C) reduced by half

D) constant

D) constant

#77. A catapult used to hold a stone of mass 500g is extended by 20cm with an applied force F. If the stone leaves with a velocity of 40m/s, the value of F is

A) 4.0 x 102N

A) 4.0 x 102N

B) 2.0 x 103N

B) 2.0 x 103N

C) 4.0 x 103N

C) 4.0 x 103N

D) 4.0 x 104N

D) 4.0 x 104N

#78. A stream is flowing at 0.75ms-1 and a boat heading perpendicular for the stream landed at the opposite bank at an angle of 30°. Calculate the velocity of the boat.

A) 1.50ms-1

A) 1.50ms-1

B) 1.00ms-1

B) 1.00ms-1

C) 0.86ms-1

C) 0.86ms-1

D) 0.65ms-1

D) 0.65ms-1

#79. A rope is being used to pull a mass of 10kg vertically upward. Determine the tension in the rope if, starting from rest, the mass acquires a velocity of 4ms-1 in 8s [g = 10ms-2]

A) 5N

A) 5N

B) 50N

B) 50N

C) 95N

C) 95N

D) 105N

D) 105N

#80. When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will

A) increase

A) increase

B) decrease

B) decrease

C) remain the same

C) remain the same

D) increase then decrease

D) increase then decrease

#81. I. Its velocity is constant II. No work is done on the body III. It has constant acceleration directed away from the centre IV. The centripetal force is directed towards the centreWhich combination of the above is true of a body moving with constant speed in a circular track?

A) II and IV

A) II and IV

B) I and IV

B) I and IV

C) II and III

C) II and III

D) I and III

D) I and III

#82. The velocity ratio of a machine is 5 and its efficiency is 75%. What effort would be needed to lift a load of 150N with the machine?

A) 20N

A) 20N

B) 30N

B) 30N

C) 40N

C) 40N

D) 50N

D) 50N

#83. In a nuclear reactor, electricity can be generated through the following processes. Arrange the processes in the correct order. i. The steam is used to drive turbines. ii. The heat energy released is removed by passing water through the reactor. iii. The turbines in turn generate electricity. iv. The water then passes through some form of heat exchanger to produce steam

A) ii, iv, i and iii

A) ii, iv, i and iii

B) i, ii, iii and iv

B) i, ii, iii and iv

C) iii, i, iv and ii

C) iii, i, iv and ii

D) iv, i, iii and ii

D) iv, i, iii and ii

#84. The duality of matter implies that matter

A) exists as a particle of dual composition

A) exists as a particle of dual composition

B) has momentum and enrgy

B) has momentum and enrgy

C) has both wave and particle properties

C) has both wave and particle properties

D) is made up of dual materials

D) is made up of dual materials

#85. In which of the following transitions is the largest quantum of energy liberated by an hydrogen atom when the electron changes energy levels? [n is the quantum number]

A) n = 2 to n = 1

A) n = 2 to n = 1

B) n = 1 to n = 2

B) n = 1 to n = 2

C) n = 2 to n = 3

C) n = 2 to n = 3

D) n = 3 to n = 2

D) n = 3 to n = 2

#86. The nucleon number and the proton number of a neutral atom of an element are 23 and 11 respectively. How many neutrons are present in the atom?

A) 11

A) 11

B) 12

B) 12

C) 23

C) 23

D) 34

D) 34

#87. The apparent weight of a body fully immersed in water is 32N and its weight in air is 96N. Calculate the volume of the body. [Density of water = 1000kgm-3, g = 10ms-2]

A) 8.9 x 10-3m3

A) 8.9 x 10-3m3

B) 6.4 x 10-3m3

B) 6.4 x 10-3m3

C) 3.2 x 10-3m3

C) 3.2 x 10-3m3

D) 3.0 x 10-3m3

D) 3.0 x 10-3m3

#88. The half life of a radioactive substance is 14 days. If 48g of this substance is stored, after how many days will 1.5g of the original substance remain?

A) 84 days

A) 84 days

B) 70 days

B) 70 days

C) 56 days

C) 56 days

D) 40 days

D) 40 days

#89. A material of mass 1.0 x 10-2kg undergoes a fission process which decreases its mass by 0.02 percent. Calculate the amount of energy released in the process. (c = 3.0 x 108ms-1)

A) 1.8 x 1020J

A) 1.8 x 1020J

B) 1.8 x 1013J

B) 1.8 x 1013J

C) 1.8 x 1011J

C) 1.8 x 1011J

D) 1.8 x 1010J

D) 1.8 x 1010J

#90. Absorption line spectra exhibited by atoms is a result of

A) change in the kinetic energy of a movimg atom

A) change in the kinetic energy of a movimg atom

B) instability of the nucleons

B) instability of the nucleons

C) excitation of an electron in the atom

C) excitation of an electron in the atom

D) transition of an electron from a higher to a lower energy level

D) transition of an electron from a higher to a lower energy level

#91. A device used to prevent wearing away of the make and-brake contacts of an induction coil is called a\an

A) fuse

A) fuse

B) electroscope

B) electroscope

C) resistor

C) resistor

D) capacitor

D) capacitor

#92. An inductor of inductance 10H carries a current of 0.2A. Calculate the energy stored in the inductor

A) 0.1J

A) 0.1J

B) 0.2J

B) 0.2J

C) 1.0J

C) 1.0J

D) 2.0J

D) 2.0J

#93. calculate the inductance of an inductor whose reactance is one ohm at 50 Hz.

A) 2.00 x 10-2H

A) 2.00 x 10-2H

B) 6.36 x 10-2H

B) 6.36 x 10-2H

C) 3.18 x 10-2H

C) 3.18 x 10-2H

D) 4.55 x 10-2H

D) 4.55 x 10-2H

#94. Borh's theory provides evidence for the

A) structure of the atom

A) structure of the atom

B) positive charge of an electron

B) positive charge of an electron

C) existence of energy level in the atom

C) existence of energy level in the atom

D) positive charge on a proton

D) positive charge on a proton

#95. In the diagram above, the current passing through the 6 omega resistor is 1.5A. Calculate the current in the 3 omega resistor

A) 1.20A

A) 1.20A

B) 0.90A

B) 0.90A

C) 0.75A

C) 0.75A

D) 0.60A

D) 0.60A

#96. In the diagram given, the current passing through the 6 omega resistor is 1.5A. Calculate the terminal p.d. of the battery in the diagram

A) 7.50V

A) 7.50V

B) 9.00V

B) 9.00V

C) 10.80V

C) 10.80V

D) 1.25V

D) 1.25V

#97. An immersion heater is rated 120W. How long does it take the heater to raise the temperature of 1.2kg of water by 15oC. (Assuming heat lost to the surrounding is negligible. Specific heat capacity of water = 4200 Jkg-1K-1C)

A) 65.0 minutes

A) 65.0 minutes

B) 60.0 minutes

B) 60.0 minutes

C) 52.5 minutes

C) 52.5 minutes

D) 10.5 minutes

D) 10.5 minutes

#98. The region around a magnet in which the magnetic influence is experienced is called

A) magnetic flux

A) magnetic flux

B) magnetic field

B) magnetic field

C) magnetic meridian

C) magnetic meridian

D) magnetic declination

D) magnetic declination

#99. In which of the following media does sound travel faster?

A) water

A) water

B) brass

B) brass

C) air

C) air

D) wood

D) wood

#100. A turning fork of frequency 600Hz is sounded over a closed resonance tube. If the first and second resonant positions are 0.140m and 0.413m respectively, calculate the speed of sound in air

A) 508.4ms-1

A) 508.4ms-1

B) 480.0ms-1

B) 480.0ms-1

C) 339.6ms-1

C) 339.6ms-1

D) 169.8ms-1

D) 169.8ms-1

#101. loudness increases as a vibrating tuning fork is brought nearer the end of a pipe containing air column due to

A) resonance

A) resonance

B) echo

B) echo

C) reverberation

C) reverberation

D) diffraction

D) diffraction

#102. the factor which enables the ear to distinguish between a note played on different instruments is the

A) pitch

A) pitch

B) speed

B) speed

C) harmonics

C) harmonics

D) loudness

D) loudness

#103. An object is situated within the Earth's gravitational field. Which of the following factor does not affect the acceleration of free fall g?

A) the distance of the object from the centre of the earth

A) the distance of the object from the centre of the earth

B) the latitude of the earth on which the object is situated

B) the latitude of the earth on which the object is situated

C) rotation of the earth

C) rotation of the earth

D) the mass of the object

D) the mass of the object

#104. In the diagram above, an incident ray AY makes an angle of 30o with the normal XY. If the mirror is rotated anticlockwise about Y through an angle of 20o, while AY is fixed, what angle will the reflected ray now make with the incident ray?

A) 70o

A) 70o

B) 80o

B) 80o

C) 100o

C) 100o

D) 120o

D) 120o

#105. A concave mirror can be used to produce a parallel beam of light if a lighted bulb is placed

A) between its focus and the pole

A) between its focus and the pole

B) at its focus

B) at its focus

C) at its centre of curveture

C) at its centre of curveture

D) between its focus and centre of curvature

D) between its focus and centre of curvature

#106. A simple microscope forms an image 10cm from an eye close to the lens. If the object is 6cm from the eye, calculate the focal length of the lens

A) 3.75cm

A) 3.75cm

B) 4.00cm

B) 4.00cm

C) 15.00cm

C) 15.00cm

D) 16.00cm

D) 16.00cm

#107. When white light passes through a triangular glass prism, there is dispersion because of

A) diffraction of light

A) diffraction of light

B) polarisation of light

B) polarisation of light

C) the difference in speed of the components of light

C) the difference in speed of the components of light

D) the interference of light waves in glass

D) the interference of light waves in glass

#108. The volume and pressure of a given mass of gas at 27oC are 76cm3 and 80cm of mercury respectively. Calculate the volume at s.t.p

A) 36.2cm3

A) 36.2cm3

B) 72.8cm3

B) 72.8cm3

C) 100.0cm3

C) 100.0cm3

D) 808.9cm3

D) 808.9cm3

#109. A piece of metal of mass 50g is cooled from 80oC to 20oC. Calculate the amount of heat lost. (specific heat capacity of the material of metal = 450Jkg-1K-1)

A) 4.50 x 103J

A) 4.50 x 103J

B) 2.25 x 103J

B) 2.25 x 103J

C) 1.80 x 103J

C) 1.80 x 103J

D) 1.35 x 103J

D) 1.35 x 103J

#110. The mass of water vapour in a given volume of air is 0.05g at 20oC, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air

A) 3.33%

A) 3.33%

B) 5.55%

B) 5.55%

C) 33.33%

C) 33.33%

D) 55.55%

D) 55.55%

#111. The mass of water vapour in a given volume of air is 0.05g at 20oC, while the mass of water vapour required to saturate it at the same temperature is 0.15g. Calculate the relative humidity of the air

A) 3.33%

A) 3.33%

B) 5.55%

B) 5.55%

C) 33.33%

C) 33.33%

D) 55.55%

D) 55.55%

#112. The temperature at which the saturated vapour pressure of a liquid is equal to the external atmospheric pressure is known as its

A) dew point

A) dew point

B) boiling point

B) boiling point

C) lower fixed point

C) lower fixed point

D) tripple point

D) tripple point

#113. A periodic pulse travels a distance of 20.0m in 1.00s. If its frequency is 2.0 x 103Hz. Calculate the wavelength.

A) 1.0 x 10-3m

A) 1.0 x 10-3m

B) 1.0 x 10-2m

B) 1.0 x 10-2m

C) 2.0 x 10-2m

C) 2.0 x 10-2m

D) 1.0 x 102m

D) 1.0 x 102m

#114. Using the force displacement diagram shown above. Calculate the work done.

A) 2000J

A) 2000J

B) 1000J

B) 1000J

C) 20J

C) 20J

D) 5J

D) 5J

#115. A machine of efficiency 8% is used to raise a body of mass 75kg through a vertical height of 3m in 30s. Calculate the power input. (g = 10ms-2)

A) 9.4W

A) 9.4W

B) 60.0W

B) 60.0W

C) 75.0W

C) 75.0W

D) 93.8W

D) 93.8W

#116. Two bodies P and Q, are in thermal equilibrium, which of the following statements about the bodies is correct?

A) the temperature of Q is higher than that of P

A) the temperature of Q is higher than that of P

B) P and Q have the same heat capacty

B) P and Q have the same heat capacty

C) P and Q have the same mass

C) P and Q have the same mass

D) P and Q are at the same temperature

D) P and Q are at the same temperature

#117. The cubic expansivity of mercury is 1.8 x 10-4K-1 and the linear expansivity of glass 8.0 x 10-6K-1, calculate the apparent expansivity of mercury in a glass container

A) 1.00 x 10-4K-1

A) 1.00 x 10-4K-1

B) 1.56 x 10-4K-1

B) 1.56 x 10-4K-1

C) 1.72 x 10-4K-1

C) 1.72 x 10-4K-1

D) 2.04 x 10-4K-1

D) 2.04 x 10-4K-1

#118. The diagram shows the variation of volume V of a glass with temperature at the point X is

A) -32oC

A) -32oC

B) -100oC

B) -100oC

C) -273oC

C) -273oC

D) -373oC

D) -373oC

#119. A uniform metre rule of mass 90g is provided at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark, determine m

A) 72g

A) 72g

B) 102g

B) 102g

C) 298g

C) 298g

D) 504g

D) 504g

#120. The resultant of two forces acting on an object is maximum when the angle between them is

A) 180o

A) 180o

B) 90o

B) 90o

C) 45o

C) 45o

D) 0o

D) 0o

#121. The bob of a simple pendulum takes 0.25s to swing from its equilibrium position to one extreme end. Calculate its period

A) 0.25s

A) 0.25s

B) 0.50s

B) 0.50s

C) 0.75s

C) 0.75s

D) 1.00s

D) 1.00s

#122. The period of oscillation pf a particle executing simple harmonic motion is 4 seconds. If the amplitude of oscillation is 3.0m. Calculate its period

A) 1.5ms-1

A) 1.5ms-1

B) 3.0ms-1

B) 3.0ms-1

C) 4.5ms-1

C) 4.5ms-1

D) 6.0ms-1

D) 6.0ms-1

#123. An inelastic collision takes place between ball of known masses, just before the collision one of the ball is moving with a known velocity while the other is stationary. Which of the following physical quantities can be determined from the information given?

A) speed of each of the ball after collision

A) speed of each of the ball after collision

B) kinetic energy of each ball after collision

B) kinetic energy of each ball after collision

C) total momentum of the ball after collision

C) total momentum of the ball after collision

D) total momentum of the two ball after collision

D) total momentum of the two ball after collision

E) mutual forces excerted by the balls

E) mutual forces excerted by the balls

#124. A wooden block of mass 1.6kg rest on a rough horizontal surface, if the limiting friction force between the block and the surface is 8N. Calculate the coefficient of friction. (g = 10ms-2)

A) 0.6

A) 0.6

B) 0.5

B) 0.5

C) 0.3

C) 0.3

D) 0.2

D) 0.2

#125. A ball bearing is gently released from rest and allowed to fall through a viscous fluid. Which of the following statements about the motion is correct?

A) its acceleration decreases before terminal velocity is attained

A) its acceleration decreases before terminal velocity is attained

B) when terminal velocity is attained the acceleration of the ball becomes zero

B) when terminal velocity is attained the acceleration of the ball becomes zero

C) its velocity increases before terminal velocity is attained

C) its velocity increases before terminal velocity is attained

D) there is no resultant force on the ball before it attains terminal velocity

D) there is no resultant force on the ball before it attains terminal velocity

#126. The driver of a car moving with uniform speed of 40ms-1 observes a truck approaching from the opposite direction with a speed of 20ms-1. Calculate the speed of the car relative to that of the truck

A) .5ms-1

A) .5ms-1

B) 2.0ms-1

B) 2.0ms-1

C) 20.0ms-1

C) 20.0ms-1

D) 60.0ms-1

D) 60.0ms-1

#127. A bus travelling at 15ms-1 accelerates uniformly at 4ms-2, what is the distance covered in 10s?

A) 150m

A) 150m

B) 170m

B) 170m

C) 350m

C) 350m

D) 600m

D) 600m

#128. An iron rod is moved from the earth to the moon. Which of the following properties of the rod would remain unchanged? i. mass ii. weight iii. relative density

A) i only

A) i only

B) ii only

B) ii only

C) iii only

C) iii only

D) i and iii only

D) i and iii only

#129. A uniform cylindrical hydrometer of mass 20g and cross sectional area 0.54cm2 floats upright in a liquid. If 25cm of its length is submerged, calculate the relative density of the liquid. (Density of water = 1 gcm-3)

A) 1.54

A) 1.54

B) 1.48

B) 1.48

C) 1.25

C) 1.25

D) 0.80

D) 0.80

#130. A magnet is being inserted into a coil of wire. On which of the following factors does the induced e.m.f in the coil depend? I. Number of turns in the coil II. Strength of the coil III. Speed with which magnet is inserted into the coil.

A) I only

A) I only

B) II only

B) II only

C) III only

C) III only

D) I and II only

D) I and II only

E) I, II,III only

E) I, II,III only

#131. I. The frictional force is independent of the area of the surfaces in conduct II. The frictional force depends on the nature of the surfaces in contact III. The frictional force depends on the speed of sliding IV. The frictional force is directly proportional to the normal reaction. Which combination of the above is true of sliding friction?

A) I, III and IV

A) I, III and IV

B) I, II and IV

B) I, II and IV

C) I, II and III

C) I, II and III

D) II, III and IV

D) II, III and IV

#132. I. Coherence II. Same frequency III. Same wavelength IV. Same Intensity Which of the conditions above are necessary to produce interference fringes?

A) I and III

A) I and III

B) I, II and IV

B) I, II and IV

C) I, II and III

C) I, II and III

D) II and III

D) II and III

#133. The diagram above shows two capacitors P and Q of capacitance 5μF and 10μF. Find the charges stored in P and Q respectively

A) 2μC and 4μC

A) 2μC and 4μC

B) 4μC and 2μC

B) 4μC and 2μC

C) 100μC and 200μC

C) 100μC and 200μC

D) 200μC and 100μC

D) 200μC and 100μC

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